package com.lianyi.commonsdk.util.security;
import java.security.MessageDigest;


public class Coder {
	public static final String KEY_SHA="SHA";
    public static final String KEY_MD5="MD5";
    
    /**
     * BASE64解密
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] decryptBASE64(String key) throws Exception {
        return BASE64Decoder.decodeToBytes(key);
    }
    
    /**
     * BASE64加密
     * @param key
     * @return
     * @throws Exception
     */
    public static String encryptBASE64(byte[] key)throws Exception {
        return BASE64Encoder.encode(key);
    }
    
    /**
     * MD5加密
     * @param data
     * @return
     * @throws Exception
     */
    public static byte[] encryptMD5(byte[] data)throws Exception {
        MessageDigest md5 = MessageDigest.getInstance(KEY_MD5);
        md5.update(data);
        return md5.digest();
    }
    
    /**
     * SHA加密
     * @param data
     * @return
     * @throws Exception
     */
    public static byte[] encryptSHA(byte[] data)throws Exception {
        MessageDigest sha = MessageDigest.getInstance(KEY_SHA);
        sha.update(data);
        return sha.digest();
    }
}
